Configure version at meson project level

Make meson aware of the project version, so that it does not print:

    Project version: undefined

app/meson.build

@@ -86,7 +86,7 @@ conf = configuration_data()
 conf.set('BUILD_DEBUG', get_option('buildtype') == 'debug')
 
 # the version, updated on release
-conf.set_quoted('SCRCPY_VERSION', '1.5')
+conf.set_quoted('SCRCPY_VERSION', meson.project_version())
 
 # the prefix used during configuration (meson --prefix=PREFIX)
 conf.set_quoted('PREFIX', get_option('prefix'))

app/src/main.c

@@ -124,7 +124,7 @@ static void usage(const char *arg0) {
 }
 
 static void print_version(void) {
-    fprintf(stderr, "scrcpy v%s\n\n", SCRCPY_VERSION);
+    fprintf(stderr, "scrcpy %s\n\n", SCRCPY_VERSION);
 
     fprintf(stderr, "dependencies:\n");
     fprintf(stderr, " - SDL %d.%d.%d\n", SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL);

meson.build

@@ -1,4 +1,7 @@
-project('scrcpy', 'c', meson_version: '>= 0.37', default_options : 'c_std=c11')
+project('scrcpy', 'c',
+        version: '1.5',
+        meson_version: '>= 0.37',
+        default_options: 'c_std=c11')
 
 if get_option('build_app')
     subdir('app')